title: [Freezing, thawing and transfer of human embryos].
abstract: We present our experience of cryopreservation of human embryos from 1 July 1987 to 1 July 1989. During this period, 667 in vitro fertilizing cycles were completed. In 173 (26%) of these cycles, a total of 805 surplus embryos were cryopreserved. 516 embryos were thawed and 247 of these were transferred to the uterine cavity in a total of 110 replacement cycles. This resulted in 22 (20%) pregnancies in which a total of 28 gestational sacs could be verified by ultrasound. Seven of the pregnancies aborted spontaneously in the first trimester and one pregnancy was ectopic. By 1 July 1989, five singleton pregnancies were in progress and 13 babies had been born from nine deliveries (one set of triplets and two sets of twins). 25% of the patients whose embryos were cryopreserved became pregnant in the in vitro fertilizing cycle after replacement of fresh embryos.
authors.affiliation: Kvinneklinikken Regionsykehuset i Trondheim.
authors.forename: A
authors.initials: A
authors.lastname: Sunde
authors.forename: V
authors.initials: V
authors.lastname: von Düring
authors.forename: J A
authors.initials: JA
authors.lastname: Kahn
authors.forename: T
authors.initials: T
authors.lastname: Sørdal
authors.forename: B
authors.initials: B
authors.lastname: Lippe
authors.forename: J
authors.initials: J
authors.lastname: Siegel
authors.forename: A
authors.initials: A
authors.lastname: Remen
authors.forename: K
authors.initials: K
authors.lastname: Molne
mesh_terms: D000328:Adult; D015925:Cryopreservation; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy
vernacular_title: Nedfrysing, tining og tilbakesetting av humane embryoer.